Section III. Technical Principles of Operation
PRINCIPLES OF OPERATION
The following functions shown on the front panel are not used
or have limited use:
The dBm position of the OFF-mV-dBm switch is not used.
The FULL SCALE AUTO pushbutton switch is not used.
The FULL SCALE dBm + 20 thru - 50 scale is not used. May be used in conjunction with dBm meter for reference.
The dBm meter is used for a zero level input reference and not for power measuring purposes.
Placing the OFF-mV-dBm switch in the mV position applies ac power.
RF PROBE and PROBE Input Connector
When the RF PROBE is connected to an rf signal source the circuits in the RF PROBE rectify and filter the rf signal.
The rectified and filtered rf signal becomes a dc voltage that is proportional to the rf signal source.1-7